Picking shoe for looms



- e. F. Hu'rcHlNS PICKING' SHOE FOR LOOKS Filed Oct. 28, 1925 2 Sheets-Sheet 1 T 22 2a W y a3 Z6 lm 15 4 v ZNVE'NTOE GEORGE G? HuTc H/NS I77- Tore/v ys G. F. HUTCHINS Fromm suon FOR LOOIIS P 2 Sheets-Sheet 2 Filed Oct. 28, 1925 R n N N 3M -T r i H 6 m E G.

Patented Dec. 6, 1927.

UNITED STATES PATENT OFFICE.

GEORGE E. HUTCIECINS. OF WORCESTER, MIASSAGHUSETTS, ASSIGNOR TO OROMPTON &

KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

rroxme srron FOR LOOMS.

Application filed October 28, 1925. Serial No. 65,473.

shoe with respect to the supporting portion thereof in order to alterthe charcter of the pick and also to correct certain defects which exist in the present form of shoe. 7

The usual form of picking shoe of the type shown herein is made as a single casting held in adjusted position on the picking shaft and has a cam fac which is engaged by the picking ball rotating with the bottom shaft. When a sharper pick is desired the shoe is moved along the pickingshaft toward the direction from which the picking ball approaches the cam face, and in order to effect any appreciable increase in the pick the shoe must be moved so far as to; bring the pick too early. It is an important object of my invention to construct a picking shoe with the cam portion adjustable angular-1y with respect to the picking and bottom shafts to the end that the pick may be varied as to character without interfering with the proper timing of the pick. "The angular adjustment of the cam face-twill causea ohangeinthe radial distance of the starting point of the cam with respect to the bottomshaft, and in order to insure the proper positioning of the cam and the picking ball I provide ad-..

justable connections between the picking shaft and the picker stick so that the starting point may be raised or lowered, as required. 9

Another feature of my invention is the provision of an angularly adjustable picking cam face movable to effect an. alteration in the radial distance between the starting and finishing points of the cam simultaneously with a change in the angle defined bylines joining these points with the center of the bottom shaft. The angle determines the time in which the pick is completed and therefore the sharpnessof the pick.

The cam face of the ordinary pickingshoe which cooperates with the picking ballis usually chilled to resist wear. I find that molders wrap the pattern when it is in the the same together sothat they will operate in effect as though they were one piece.

It is a more particular object of my in-" vention to provide a multi-part picking shoe having interengaging conical surfaces so related as to define a space between the parts for the entry of a tool by means of which removed and replaced without disturbing the picking shaft.

l Viththese and other objects in view which they may be separated and the wearing part will appear as thedescription proceeds. my

invention resides in the combination and ar' rangement of parts hereinafter described and set forth intheclaims.

In the accompanying'drawingswherein I have shown a convenient embodiment of "my invention, 7

' 1 isa side elevation of a picking arm anda picking shaft, showing the shoe in operative relationship with. respect to the arm as they appear at the beginning of a picking stroke, 5 p i Fig. 2 is an enlarged top plan view of the picking shoe looking in the direction of arrow 2, Fig. 1, I i

Fig. 3'is a side elevation of the shoe looking, in the direction ofarrow 3, Fig. 2, n

Fig. 4 is a front elevation of the shoe looking in the direction ofarrow 4:, Fig. 3,

V Fig. 5 is a vertical section on line'55 of Fig. 2 looking in the direction of the arrows,

Fig. 6 is a front elevation of one end of a loom showing the mounting and connections for the picker, together with my improved picking shoe, I I

Fig 8 is atview similar to a part of Fig. 7, but showing the cam face adjusted to give I e different character of pieaaaa 1 Fig. 7 is arerticalsection onlinei 'i of ingj shoe is formed of a supporting member .16 and a cam'section or member 17. The

supporting member 16 has extending therethrough an opening substantially the same size as the cross section of the picking shaft andis held in fixed-position on the latter As shown in Figs. 2 and ,3 said supporting mem- .27 which are chilled to resist wear.

Fig. 9 is a detail top plan of the picker stick connector taken in the direction of :saidstuds has rotatably mounted thereon a picking ball lland as the shaft 11 rotates the balls will be brought successively into ,contact with any improved picking shoe about to be described. The arm illustrated is for a so-calledpickand pick loom, but by omitting one of the rolls the arm could be appliedto' a loom havinga single box at one side.

I A picking shaft 15 preferably rectangular 'in. cross section isrotatablymounted in the 100m frame L to extend substantially at right anglesito and below the shaft 11.. The pickbymeans of a pair of set screws'lS.

ber 16 is provided with a pair of ears 19 through which extend set screws 20 which may be heldin adjusted position by lock nuts 21. As shown in Fig. 5 thereis projecting laterally from the supporting membera conical journal ,22 theouter end of which has a threaded hole ,23 therein to .receive a screw 24. I e

The cam member lTis provided with an' upstanding arm 25 having substantially parallel vertical faces which are engaged by the set screws 20 and said cam memberlT 1s .proyided witha conical bore26 fitted closely over the journal 22. Said cam member is also provided with the usual cam surfaces A washer28 extends acrossthe-small end .of the bore 26 and cooperates with the head of screw '24 to hold the member 17 tightly against the journal 22.. In order to facilitate removal of the cam member 17 fronithe' journal 22 I provide the supportingmember 16 with a lug 29 between which and the adjacent surface of section 17 an appropriatetool such as a screw driver may be inserted to disengage the members.

The relation of the picking shoe the picker .stick and connections therefor. are. I shown in F gs. 6,7, and 8, where it will be seen thatI have secured to the picking shaft 15 a sweep arm 40 the "upper end of which is connected as at 4:1 to a power stick or picker stick connector 42. As shown in Figs. 6 and 9 the power stick 42 is formed of two parts which are held together in adjusted relation by bolts 13 to vary the length of said power stick. The outer end of the power stick is connected by a bolt 451 to a lug strap 4.5 which extends around picker stick 16 and is held to the latterby-a flexible holder 17' secured to the picker stick.-

The lug strap 4:5 is provided with an extra hole 18 to receive the bolt as when the con nections to the picker stick are to be shortened.

' A rock shaft 19 located at the bottom of the loom has secured thereto a rocker iron 50 slotted. as at 51 to receive a stud 52 which passes through the lower end of the picker stick 46 and forms a pivotal support forthe same. A tension spring 53 is connected at the inner end to an arm 54tsecured tothe rock shaft 49 and the other end of said spring isconnected by a leather strap 55 to the picker stick. The normal action of the spring 58 is to move the picker st1ck.to .the outward position shown in Fig. 6, the upper end of the picker stickbeing limited in its outer motion by the endof the lay 56 which moves about the rock shaft 19;

During the normal operationof "the 100111 the bottom shaft 11 will rotate constantly righthand movement of the picker shaft 15 as shown in Fig; 6 and a corresponding inwardmovement ofthe picker stick. When it is desired to alter'the character of the pick,

as for instance to render the samesharper o r quicker, the screws 20 and "24 will be loosened and-the cam member 17 given a slight counterclockwise movement from the shoe together rigidly.

It will be noted by referring to 8 that the adjustment described moves the starting point-of the cam face downwardly and slightly to the right and also moves the finishing point of the'cam to the left. The

effect ofthis isfto reduce theangle defined slightly greater angle. -'Thusit will be seen that the adjustment from the position shown in Fig. 7 to that shown in Fig. 8 makes a more powerful pick for two reasons, namely, the picking motion is completed in a shorter time and the picking cam and shaft are moved through a greater distance.

WVhen the adjustment described is made it is foundthat it is necessary to raise the picking shoe slightly so that the picking ball will strike the cam at the starting point and this result may be accomplished by shortening the distance between the picker stick and the sweep arm either by changing the length of the picker stick connector 42 or by changing the position of bolt a l. The

same result might be accomplished by leaving the connector and lug strap unchanged and moving the stud 52 outward slightly in slot 51.

From the foregoing li/Wlll be seen that I have provided a picking shoe made in two parts and having the cam portion thereoi adjustable withrespect to the picking shaft so as to obtain any desired character of picking motion without moving the picking shoe along the picking shaft. It will further be noted that the adjustments of the picking member to vary the angle during which the picking shoe is acted upon is accompanied g by a simultaneous change in the amount or motion of the pickingshoe. Also, it will be noted that the wearing portion of the shoe maybe readily removed from the picking shaft without disturbing the setting of the latter and that slight variations due to improper setting of the chill for the cam face canbe compensated forby the adjusting screws 20. p

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention, and I do not wish to be limited to the details disclosed herein but what I claim is:

1. In a picking motion for looms, an actu a-ting member movable about a fixed center, a member to be actuated thereby movable about a second center, and a cam supported by one of said members and movable about a 7 third center and capable of assuming all angular positions within predetermined limits with respect to the first and second named centers.

2. In a picking motion for looms, an actuating member movable in a fixed path, a member to be engaged and actuated thereby, a picker stick, adjustable connections between the picker stick and the member to be actuated, a cam face supported by one of said members to engage the other member, and means to vary the position of the cam face with respect to the supporting member therefore and also the fixed path to render said cam face capable ofasuming all angular positions within predetermined limits to -alter the kind of motion imparted to thepicker stick when the members engage each other.

3. In a picking motion for looms, anactuating member movable about a fixedcenter, a member to be actuated thereby, a picker stick operatively connected to the member to be actuated, acam supported by one of said members, and means to vary the position of the cam with respect to the fixed center to render said cam capable of assuming all angular positions within predetermined limits while the supporting member for said cam retains the same relative position with respect to the fixed center.

4. In a pickingmotion for looms, an actuating member movable about a fixed center, .a member to be actuated thereby, a picker stick, a cam supported by one of said mem bers, means to vary the position of the cam with respect to the fixedcenterwhile the supporting member for said cam remains unchanged in its position with respect to the fixed centeix and connections between the picker stick and themember to be actuated variable as to length to move the 'cam' with respect to the actuating member to move the starting point of the cam to approximately the same position of the cam. r

5. Ina picking motion for looms, an actufor alladjusted positions,

ating ineniber movable about a fixed center, i

a member to be actuatedfthereby movable about a second center, a camsupported by,

one ofsaid members and movable 'about a third center toassumedifierent angular .po-

sitions with resp'ectlto the first and second named centers, andfmearis' independent of the members to move the cam about the center of the member on which said cam is sup ported to position thestarting point of the caniin'approximately the same place for the various angular positions the cam may assume.

6. In a picking motion for looms, an actuating member rotating about a fixed cen ter, a member to be actuated by the actuating member having a surface to be engaged by the actuating member and having startmg and finishing points, and means to render the second named member capable of assuming all angular positions within predei termined limits relatively to the fixedicenter to effect a change in the angle defined lines v joining the starting and {finishing points with the fixed center whilethe memberto be actuated remains in the same relative position Witlrrespect to the actuating member.

,8. In a picking motion for looms, an actuating member movable about a fixed cen- @ter, amember' to be actuated by. said actuating member having a face to be engaged by the actuating memberduring a portion or the movement of the latter and having'a startin and a finishin )oint and means to render the second named member capable of assuming .all angular positions. Within predetermined limits relatively to the fixed center to effect a changeinthe radial distance ofthe finishing and starting points of the face with respect to the fixed center While the members retain the same relative posi- 'tion.

9. Ina picking motion for looms, an actuating member movable about afixed center, amember to be actuated thereby having a cam face with astartmg and a finishing point, and means to render the second named member capable of assuming all angular positions Within predetermined limits relatively to the fixed center to efiectv a change in the angle defined between lines joiningthe fiXed center with the starting and finishing points simultaneously with a variation in theradial distancebetween said starting and finishing points with respect to the fixed center While the members retain [the same relative position.

p, In a picking motion for looms, an ac-' tuating member movable aboutia fixed center, a member to be ,actuatedthereby, a cam havingistarting and finishing points mounted on onevofsaid members for relative movement with respect to the same, and means to render the second named member capable of assuming all angular positions within predetermined limits relatively to thefixed center to effect a change in the angular distance betweenthe starting and finishing pointsof the cam Wlth respect to the fixed center simultaneously with ,a variation in the radial distance between the starting and finishing points of the cam with respect to the fixed center of the actuating member.

11. Ina pickingmotionfor looms, an actuating member movable about a fixed center,,a member to be actuated thereby, a cam capable of assuming all angular positionsbetween predetermined limits and having startingand finishing points mounted on one of said members and movable with respect thereto to eifecta reduction in the angular distance between the starting and finishing points with respect to the fixed :center si-i GEORGE F. H UTCHINS. 

